From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4A3D27FD76 for ; Mon, 24 Nov 2025 19:02:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764010923; cv=none; b=p6I43D668tgF5DNAxwP3z3Mpy43SkZh3lgHrI3Z0OumrpnMAXI9c24C8ZAc5Yp/CzdN9nAlX3V2dZhZYvTNVp6R/+glC7Mpp7G7pnwJHDj4mZ/NSp3TiDbaWwrP2HEze4hgBGLkHEOpBdJ+SnXMPJ/O9zZV4kjTDCygv1AReKz4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764010923; c=relaxed/simple; bh=Ne1nWoAtvGja0yTRw6Jt+6foMsIzRmryzzpbl9RZQ50=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E5SpkPhW59dcU3lgelUITkupAduKfcqSPXXcC4TJk9pqcK2ghRobJ+1yLlb2d7fD2+bkiNHJXBACt+YEB3dki4SqW1lZJ5l0+yyTlI3mMhvLxf5E8v8fNEReUEXKlqYuaN4pOmcHARehL6yTKuZFJhEt/I05zr+uImuFfk9q1m4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ReJcIq4x; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ReJcIq4x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69DCFC19421; Mon, 24 Nov 2025 19:02:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764010922; bh=Ne1nWoAtvGja0yTRw6Jt+6foMsIzRmryzzpbl9RZQ50=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ReJcIq4xhkcoBd7T5xr48VUYx2e6VSCfLXSkDlpLTHEB9jG/aPEm7Fxs3r2ezIGbQ O4+IPHAEfrIFbZpJfiYKwI+/wK5N93lyTzsy4sdHGSEZO5C8t9bdeBhQd4WGNNNp+k xb/rB4r76P+aGMxpUZWm9teHZtmknnvKQzPTSv4ZG9I0SeKLkwPNKyOqR5NUkgmjRe iPllvZGAz62OkfJT33jqnbmTwGPpRvdHwhU/nyuh58jOP2fsbixhn2HlKy1gbtBb9X iV75lkOHpwGQBP+pLK1Mn5HtdfZZyEWOuchJoEmDTgiR9IU5esbAMfPMm9PlVrHYX2 7pMiiZHdFMk7g== From: Oliver Upton To: kvmarm@lists.linux.dev Cc: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Oliver Upton Subject: [PATCH v3 14/15] KVM: arm64: nv: Expose hardware access flag management to NV guests Date: Mon, 24 Nov 2025 11:01:56 -0800 Message-ID: <20251124190158.177318-15-oupton@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251124190158.177318-1-oupton@kernel.org> References: <20251124190158.177318-1-oupton@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Everything is in place to update the access flag at S1 and S2. Expose support for the access flag flavor of FEAT_HAFDBS to NV guests. Signed-off-by: Oliver Upton --- arch/arm64/kvm/nested.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c index 6495442f400a..88d7dfb44410 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -1599,11 +1599,13 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val) case SYS_ID_AA64MMFR1_EL1: val &= ~(ID_AA64MMFR1_EL1_CMOW | ID_AA64MMFR1_EL1_nTLBPA | - ID_AA64MMFR1_EL1_ETS | - ID_AA64MMFR1_EL1_HAFDBS); + ID_AA64MMFR1_EL1_ETS); + /* FEAT_E2H0 implies no VHE */ if (test_bit(KVM_ARM_VCPU_HAS_EL2_E2H0, kvm->arch.vcpu_features)) val &= ~ID_AA64MMFR1_EL1_VH; + + val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64MMFR1_EL1, HAFDBS, AF); break; case SYS_ID_AA64MMFR2_EL1: -- 2.47.3